Miss Kabaeva, 31, has been rumoured to be in a relationship with Mr Putin for several years, but the Kremlin has never acknowledged any link between the pair.
You should give precise details of the type of travel document you have ( Sometimes a child travels with a person who is not their legal representative or with a parent who does not bear the same surname.
It is not in Putin's interests." It is not the first time that questions have been asked about Mr Putin's health.
In late 2012, he was seen limping and then cancelled or postponed a series of foreign trips leading to speculation that he was unable to withstand long flights.
Reporters last saw the president when he met Matteo Renzi, the Italian prime minister, on March 5.
Photographs of Mr Putin meeting officials one-on-one have been put on the Kremlin website since then but his gathering with a group of women for International Women's Day on March 8 actually took place three days earlier, according to one participant.
Mr Peskov has been forced to deny increasingly lurid stories of ill health, death, and even a coup instigated by disgruntled senior officials.